JP2011086874A - Organic el lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic EL lighting apparatus capable of freely adjusting the emission direction of illumination light, and easily manufacturable. <P>SOLUTION: This organic EL lighting apparatus 1 is composed of an organic EL light source 2, a rotary motor 3 and a lighting circuit 4. The organic EL light source 2 is a light source device composed by housing a board 6 in a casing 5, and a first organic EL element 7 and a second organic EL element 8 are laminated on the upper surface and the lower surface of the board 6, respectively. The rotary motor 3 is fixed to the upper surface of the casing 5 to set a rotary shaft 11 parallel to the board 6. The lighting circuit 4 is an electric circuit housed in the casing 5, and controls power supplied from an external power source not shown in the figure to light all of the first and second organic EL elements 7, 8 or either of the first and second organic EL elements 7, 8. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an organic EL lighting device, and more particularly to an organic EL lighting device having a dimming function.

  An organic EL element is a light emitting element in which a light emitting portion composed of a hole transport layer, a light emitting layer and an electron injection layer is sandwiched between an anode and a cathode. Further, an organic EL lighting device using this organic EL element as a light source is known.

  For example, in Patent Document 1, a plurality of organic EL light sources in which an organic EL element having one or more light emitting layers between an anode and a cathode is formed on a light-transmitting substrate are stacked, and each organic EL light source is independent. Or the organic electroluminescent illuminating device which enabled it to change the intensity | strength and color tone of light emission by controlling in conjunction is disclosed.

JP 2006-155940 A

  However, since the organic EL lighting device disclosed in Patent Document 1 lacks means for freely adjusting the direction of the light emitting surface of the organic EL light source, in order to adjust the irradiation direction of the illumination light, the organic EL lighting device There was a problem that the whole direction had to be changed.

  Moreover, in the organic EL lighting device disclosed in Patent Document 1, since the organic EL elements are arranged in a single layer on a single substrate, a plurality of substrates on which the organic EL elements are arranged are manufactured, and these are manufactured. Since it is necessary to laminate, there is a problem that the manufacturing process becomes complicated.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide an organic EL lighting device that can freely adjust the irradiation direction of illumination light and is easy to manufacture.

  An organic EL lighting device according to the present invention is an organic EL light source having a single substrate and a plurality of organic EL elements stacked on the substrate, and selectively lighting a part or all of the plurality of organic EL elements. And a light source rotating means for rotating the organic EL light source to change the direction of the light emitting surface of the organic EL light source.

  According to the present invention, it is possible to freely adjust the irradiation direction of illumination light and fix the irradiation direction in an arbitrary direction. Moreover, since a plurality of organic EL elements are stacked on a single substrate, an organic EL lighting device including an organic EL light source in which a plurality of organic EL elements are stacked can be easily manufactured.

1 is an outline view of an organic EL lighting device showing a first embodiment of the present invention. It is a figure which shows the state which attached the organic electroluminescent illuminating device to the ceiling. (A) is an external view, (b) is a side view which shows a function. It is an external view of the organic electroluminescent illuminating device which shows the 2nd Embodiment of this invention. It is a figure which shows the modification of the organic electroluminescent illuminating device which concerns on 2nd Embodiment. It is an external view of the organic electroluminescent illuminating device which shows the 3rd Embodiment of this invention. It is an external view of the organic electroluminescent illuminating device which shows the 4th Embodiment of this invention. It is an external view of the organic electroluminescent illuminating device which shows the 5th Embodiment of this invention. It is an external view of the organic electroluminescent illuminating device which shows the 6th Embodiment of this invention.

  Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
An organic EL device 1 shown in FIG. 1 is an example of an embodiment, and includes an organic EL light source 2, a rotary motor 3, and a lighting circuit 4.

  The organic EL light source 2 is a light source device configured by housing a substrate 6 inside a casing 5, and a first organic EL element 7 and a second organic EL element 8 are provided on an upper surface and a lower surface of the substrate 6, respectively. Are stacked.

  The substrate 6 is a flat plate that mechanically holds the first and second organic EL elements 7 and 8 and is made of a light-transmitting material, and the first and second organic EL elements 7 and 8 are formed. The light emitted from can pass through the substrate 6 and travel toward the opposite side of the substrate 6.

  The first and second organic EL elements 7 and 8 are known light-emitting elements having a light-emitting portion sandwiched between an anode and a cathode, and emit light when a voltage is applied between the anode and cathode from a power supply device (not shown). The part emits light.

  The light emission colors of the first and second organic EL elements 7 and 8 are determined by the light emitting material contained in the light emitting layer. For example, if anthracene, tetracene, coumarin, or the like is included in the light emitting layer, the light emission color of the first and second organic EL elements 7 and 8 is red. Further, if a quinoline metal derivative, an aminoquinoline derivative or the like is contained in the light emitting layer, green light emission can be obtained, and if an arylethynylbenzene derivative, a thiophene derivative or the like is contained in the light emitting layer, blue light emission can be obtained.

  Further, the emission intensity of the first and second organic EL elements 7 and 8 can be adjusted by the magnitude of the applied voltage.

  The first and second organic EL elements 7 and 8 are stacked on the substrate 6 by a known method such as vacuum deposition.

  A window 9 is opened on the side of the casing 5 facing the first organic EL element 7, and light emitted from the first and second organic EL elements 7 and 8 passes through the window 9 to the outside. To be emitted.

  A reflective layer 10 is formed on the upper surface of the second organic EL element 8. The reflective layer 10 reflects the light emitted from the first and second organic EL elements 7 and 8 passing through the upper surface of the second organic EL element 8 toward the inside of the casing 5 and directs it toward the window 9. Radiates to the outside through the window 9. The reflective layer 10 is formed by evaporating metal aluminum on the upper surface of the second organic EL element 8, for example.

  The rotary motor 3 is fixed to the upper surface of the casing 5 so that the rotary shaft 11 is parallel to the substrate 6. The rotary shaft 11 extends in the front and rear directions of the rotary motor 3 and is fixed to a frame described later at the front and rear ends. Therefore, when the rotary motor 3 is rotated, the organic EL light source 2 rotates around the rotation shaft 11.

  Thus, the organic EL lighting device 1 can freely change the direction of the light emitting surface of the organic EL light source 2 by rotating the organic EL light source 2.

  The lighting circuit 4 is an electric circuit housed in the casing 5 and controls electric power supplied from an external power source (not shown) so that all of the first and second organic EL elements 7 and 8 are Alternatively, one of the first and second organic EL elements 7 and 8 is turned on. The lighting circuit 4 can also individually adjust the emission intensity of the first and second organic EL elements 7 and 8.

  Since such a lighting circuit 4 is provided, the organic EL lighting device 1 can freely change the emission color and emission intensity. For example, anthracene is contained in the light emitting layer of the first organic EL element 7 so as to obtain red light emission, and a quinoline metal derivative is contained in the light emitting layer of the second organic EL element 8 to emit green light. If the first organic EL element 7 is lit alone, the organic EL lighting device 1 emits red light, and if the second organic EL element 8 is lit alone, the organic EL lighting device 1 Emits green light. Moreover, if the 1st organic EL element 7 and the 2nd organic EL element 8 are lighted simultaneously and the combination of both emitted light intensity is changed, light emission of yellow, orange, brown, etc. will be obtained.

  Now, the organic EL lighting device 1 is used by being attached to the ceiling 12, for example, as shown in FIG. That is, the end of the rotating shaft 11 of the rotary motor 3 is fixed to the pair of frames 13 that hang down while being fixed to the ceiling 12 at the upper end. Since the rotating shaft 11 is fixed to the frame 13, the organic EL light source 2 rotates around the rotating shaft 11 when the rotating motor 3 is rotated. Therefore, if the rotation motor 3 is rotated and stopped at an arbitrary position, the irradiation direction of the organic EL lighting device 1 can be arbitrarily selected (see FIG. 2B).

(Second Embodiment)
In the first embodiment, an example in which the first and second organic EL elements 7 and 8 are stacked on both surfaces (upper surface and lower surface) of the substrate 6 has been described. However, as illustrated in FIG. The first organic EL element 7 and the second organic EL element 8 may be formed so as to overlap each other. In this case, a light reflective material is selected as the material of the substrate 6. Of the light emitted from the first and second organic EL elements 7, 8, the light emitted to the back side of the substrate 6 (the side where the first and second organic EL elements 7, 8 are not stacked). This is because it turns to the front side.

  Instead of using the material of the substrate 6 as a light-reflective material, as shown in FIG. 4, a reflective layer 10 is formed on the surface of the substrate 6, and the first and second organic EL elements are formed on the reflective layer 10. 7 and 8 may be laminated.

(Third embodiment)
In the first embodiment, the example in which the rotation motor 3 is fixed to the organic EL light source 2 has been described. However, the organic EL light source 2 and the rotation motor 3 can be separated. For example, as shown in FIG. 5, the organic EL light source 2 is rotatably supported by a pair of holders 14 hanging from the ceiling 12, and the rotation shaft 11 of the rotary motor 3 fixed to the pedestal 15 is used as the organic EL light source 2. You may make it connect to.

(Fourth embodiment)
Alternatively, as shown in FIG. 6, the organic EL light source 2 is rotatably supported by one holder 14 arranged on one side of the organic EL light source 2, and the holder 14 is sandwiched between the organic EL light sources 2. The rotary motor 3 may be disposed on the opposite side, and the rotary shaft 11 of the rotary motor 3 may be connected to the organic EL light source 2.

(Fifth embodiment)
In the first to fourth embodiments, the example in which the organic EL light source 2 is rotationally driven by the rotation motor 3 has been described. However, the organic EL light source 2 can also be manually rotated. For example, as shown in FIG. 7, the organic EL light source 2 is rotatably supported by a pair of holders 14 suspended from the ceiling 12, and the handle 16 is turned by hand to change the direction of the organic EL light source 2. Also good.

(Sixth embodiment)
Alternatively, the handle 16 can be omitted. For example, as shown in FIG. 8, the organic EL light source 2 is rotatably supported by a pair of holders 14 hanging from the ceiling 12, and the organic EL light source 2 is directly turned to change the direction of the organic EL light source 2. You may do it.

  As described above, since the organic EL lighting device 1 can change the direction of the organic EL light source 2 by electric or manual operation, the illumination light can be changed without changing the mounting position and mounting direction of the organic EL lighting device 1 as a whole. You can change the direction.

  In addition, since the organic EL lighting device 1 has a plurality of organic EL elements (first and second organic EL elements 7 and 8) stacked on a single substrate 6, each of the plurality of organic EL elements. Compared to a conventional device having a substrate, the manufacturing is easier and it is suitable for reducing the weight of the device.

  However, the embodiments disclosed herein are merely illustrative of specific embodiments of the invention. Accordingly, the technical scope of the present invention is not limited to the embodiments disclosed herein. The present invention can be freely modified, applied or improved within the scope of the technical idea described in the claims.

  For example, in the present specification, an example in which the organic EL light source 2 includes two organic EL elements (first and second organic EL elements 7 and 8) has been described. However, the organic EL element included in the apparatus of the present invention. Is not limited to two. Three or four or even more organic EL elements can be provided. If the number of organic EL elements is increased, variations in emission color and emission intensity are expanded, so that the color rendering effect by the organic EL lighting device is improved.

  The organic EL element may be laminated on both sides of the substrate or may be laminated only on one side. Moreover, when laminating | stacking an organic EL element on both surfaces of a board | substrate, you may make the number of layers of both surfaces equal, or may be non-uniform | heterogenous (for example, two layers on an upper surface and one layer on a lower surface).

  Moreover, the structure and manufacturing method of the organic EL element shown in this specification are examples, and it goes without saying that various known or future-constructed organic EL elements can be arbitrarily selected.

  Further, in the present specification, an example in which the organic EL light source 2 is rotationally supported with both ends is shown, but the technical scope of the present invention is not limited to that in which the organic EL light source 2 is rotationally supported with both ends. It goes without saying that the apparatus of the present invention can be realized by cantilever support.

  Moreover, the organic EL lighting device of the present invention is not used only for direct lighting applications. Indirect illumination can also be performed by changing the installation location and the irradiation direction of the light source.

DESCRIPTION OF SYMBOLS 1 Organic EL lighting device 2 Organic EL light source 3 Rotating motor 4 Lighting circuit 5 Casing 6 Board | substrate 7 1st organic EL element 8 2nd organic EL element 9 Window 10 Reflective layer 11 Rotating shaft 12 Ceiling 13 Frame 14 Holder 15 Base 16 handle

Claims (6)

An organic EL light source having a single substrate and a plurality of organic EL elements stacked on the substrate;
A lighting circuit for selectively lighting part or all of the plurality of organic EL elements;
A light source rotating means for rotating the organic EL light source to change the direction of the light emitting surface of the organic EL light source,
An organic EL lighting device. The lighting circuit individually adjusts the light emission intensity of the plurality of organic EL elements.
The organic EL lighting device according to claim 1. The plurality of organic EL elements have different emission colors.
The organic EL lighting device according to claim 1 or 2. The substrate is a light transmissive substrate;
The organic EL element is laminated on both surfaces of the substrate with the substrate interposed therebetween,
A reflective layer is laminated on the upper layer of the organic EL element laminated on the uppermost layer of any one surface of the substrate,
The reflective layer reflects light emitted from the organic EL element laminated on one surface of the substrate and directs it to the other surface of the substrate.
The organic EL lighting device according to any one of claims 1 to 3, wherein The substrate is a light reflective substrate;
All of the plurality of organic EL elements are laminated on any one surface of the substrate.
The organic EL lighting device according to any one of claims 1 to 3, wherein All of the plurality of organic EL elements are laminated on one surface of the substrate,
Having the reflective layer between a layer closest to the substrate and the substrate;
The organic EL lighting device according to any one of claims 1 to 3, wherein

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